@back:back;
@red:#f00;
@font-sm:14px;
@font-md:16px;

body{
  background-color: @red;
}
html{
  font-size: @font-sm;
}
section{
  color:@back;
  font-size:@font-md;
  transform: scale(1.1);
}
.autoplacement-example {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  grid-gap: 20px;
}

div{
  opacity: .4;
  animation: snake 1s linear forwards;
}
@keyframes snake {
  0%{
    opacity: 0;
  }
  100%{
    opacity: 1;
  }
}